Pipe-wrench



(No Model.)

T. M. RIGHTER & G. JEFFRYE S PIPE WRENCH.

No. 602,229. Patented Ap r. 12, 1898.

wuexwtoz S NlTE STATES;

or MOUNT CARMEL,

PIPE-WRENCH.

SPECIFICATION forming part Of Letters IPatent NO. 602,229, dated April12, 1898.

Application filed December 13, 1897. Serial No. 661,655. (No model.)

T at whom it may concern:

Be it known that we, THOMAS M. RIGHTER" and GEORGE J EFFRYES, citizensof the United States, residing at Mount Carmel, in the county ofNorthumberland and State of Pennsylvania, have invented certain new andusef ul Im proveinents in Pipe-Wrenches, of which the following is aspecification.

Our invention consists in a pipe-wrench comprising a handle which servesas a lever, a pair of rotating jaws on opposite sides of the handle,mounted on a pivot-bolt passing through the same, and a chain which isconnected with the handle at one end and provided with pivot-pins whichprojectfrom the links on both sides of the chain and are adapted toengage slots on the inner faces of the jaws.

For a detailed description of the inventio reference is had to thefollowing specification and to the accompanying drawings, in whichFigure 1 is a side view of our improved wrench, showing it in operation,one of the jaws being removed to show the interior construction. Fig. 2is a cross-section on the line 2 2 of Fig. 1, some of the parts beingshown in full. Fig. 3 is a side view showing the manner of releasing thegrip, and Fig. 4 is an inside view of one of the jaws.

Referring to the drawings, A is a handle or lever, through one end ofwhich apivot-bolt 1 passes, said bolt being free to turn in the handle.Upon the projecting ends of the pivot-bolt are a pair of rotating jaws2, connected with the bolt so as to turn simultaneously. As shown, theyare connected by suitable keys or feathers 3. Between the jaws and thelever are preferably placed washers 4, and upon its outer ends the pivotis pro vided with a head 5 and nut 6 or other suitable means forretaining the jaws in position.

The jaws 2 are preferably circular and provided with a series ofrecesses 7, suitably curved to receive pipes or rods of differentdiameters and provided withteeth to prevent slipping. Theinnerfaces ofthejawsbetween the recesses are provided with inclined slots 8,extending inward a short distance from the periphery.

Connected with the handle near the pivot 3 is a chain B, whichcooperates with the jaws to grip the article to be turned. The pivotpins9 of the chain project from both sides thereof and are adapted to passinto the slots 8 in the jaws. To avoid any tendency of the pins to slipout of the slots, the latter are preferably inclined instead of radial.The chain should be long enough to embrace the largest pipe for whichthe jaws are adapted.

In Figs. 1 and 3 the wrench is shown in operation upon a pipe 0.

The operation is as follows: The jaws are rotated until the recess bestadapted for the pipe or rod is brought into proper position. The wrenchis then applied to the pipe and the chain wrapped around it, as shown inFig. 1, the projecting ends of one of the pins in the chain being passedinto a pair of the slots 8. It will be evident that when the lever ismoved in the direction of the arrow in Fig. 1 it will draw the chainpowerfully against the pipe, causing the teeth of the rotary jaws totake hold, after which the pipe will turn with the lever. Immediatelywhen the lever is moved backward, or in the direction of the arrow inFig. 3, the chain will slacken and the entire wrench will turn freelyabout the pipe into position to take a new grip. I

It will be seen that our improved wrench is very simple in constructionand that a single wrench may operate upon many sizes of pipe. Instead ofthe bolt and nut shown in the drawings the pivot-pin may be upset orriveted upon the jaws. The jaws may be conn'ected'to the pin by splines,as shown, or by any equivalent construction.

Having described our invention, what we claim, and desire to secure byLetters Patent,

1s W v I 1. In a pipe-wrench, the combination of a lever, a pivot-boltpassing through the lever, a pair of jaws fixed upon and adapted torotate with said bolt, toothed recesses in the periphery of said jaws,slots in the inner faces of the jaws between the recesses, and'a chainconnected with the lever and provided with pins adapted to engage theslots in the jaws, substantially asdescribed.

2. A pipe-wrench comprising alever or han die, a pivot-bolt free to turnin an opening in said handle, a pair of circular jaws arranged upon thebolt on opposite sides of the handle, inclined slots in the inner facesof said jaws, said slots extending inward from the periphery and beinginclined to the radii, a chain connected with the handle near thepivotbolt, said chain having pins projecting from the sides thereofadapted to be seated in the inclined slots of the jaws, substantially asde- I scribed.

In testimony whereof we affix our signatures in presence of twowitnesses.

THOMAS M. RIGHTER. GEORGE JEFFRYES. Witnesses W. B. FAUsT, A. E.SHOEMAKER.

